I get a question about how to capture screenshots (windows, desktop, etc.) or recording videos of the screen every couple of weeks. I've put my notes and my recommended tools in this post:
Windows ($): Hyperionics Hypersnap DX http://www.hyperionics.com/
Windows Vista (free): Snipping Tool in Vista
Mac ($): Snapz Pro http://www.ambrosiasw.com/
Windows: Camtasia Studio http://www.techsmith.com/
Saveen Reddy
[2007-05-31] Update
[2005-09-10] First Published